What are the main differences between sambal oelek and gochujang, and how do their flavors and uses compare?

Sambal oelek is a spicy Indonesian chili paste made with chili peppers, vinegar, and salt, while gochujang is a Korean fermented chili paste made with chili powder, glutinous rice, fermented soybean powder, and salt. Sambal oelek has a bright, fresh chili flavor with a tangy kick, while gochujang has a deep, complex umami flavor with a sweet and spicy taste. Sambal oelek is often used as a condiment or ingredient in cooking, while gochujang is commonly used as a marinade, sauce, or base for stews and soups in Korean cuisine.